Valve device



Sem., 118 s, 1923, Mgfi@ J. ZANDER VALVE DEVICE Filced April 6; 1923.

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Patented Sept. A18, 1923.

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TOEN ZANDER, 0F CHICAGO, ILLINOIS.

vALvE Application ined April 6,

invented a new anduseful Improvement inA Valve Devices, of which thefollowing is a My invention relates more particularly to valve devicesadapted for use more especially as fluid pressure controllers forinsuring the uniform 'flow of Huid pressure to its point of use from asource of fluid pressure regardless of variations in pressure of theiiuid at thesource, variations in back-pressure, or both.'

:I have devised my invention for use more especially, though not to theexclusion of such other uses to which it may be put, in connection withartificial refrigerating sys tems wherein a' refrigei'ating agent suchas ammonia is employed and involves for performing the refrigeratingfunction the expansion of liquefied refrigerant into `aI gaseouscondition and for such functioning employs a so-called expansion Valvein which my invention maybe embodied and used to great advantage. y yprimary. object is to provide valve mechanism' especially tov constitutethe expansion .valve of such a system, which shall operate accuratelyand effect uniform flow of Huid pressure, regardless of variations inthe pressure of the supply, back-pressure where it exists, .or both, andwhich shall not be liable to impairment; and other objects as will bemanifest from the following description. i

Referring to the accompanying drawings, Figure lis a view in sectionalelevation of valve mechanism, shown as of the eiipansion type referredto, and constructed in accordance with my invention; and Fig. 2, asection takenat the line 2 2 of Fig. l and viewed in the directioniofthe arrows, onehalf of the diaphragm of the device being omitted.

The device according to t-he preferred illustrated embodiment of myinvention, is

formed of a casing represented at 4 and preferably-provided in sectionsrepresented at 5 and 6, these sections fitting flatwise together at diskportions 7 and 8 respectively' 'thereof at which they are securedtogether as through the medium of bolts 9 passing its marginal edgesbetween the nevica.

1921. "Serial N'o. 458,943.

through themarginal edges of these disks.

The opposed surfaces of the disks 7 and 8 are recessed as represented atJl0 and 11 and extending across the space provided by these recesses, isa flexible diaphragm of any suitable material and represented at 12,this diaphragm being clamped by the bolts 9 at annular portipns of thedisks 7 and 8 surrounding. the recesses 10 and 11, the diaphragm 12 conitaining a centrally disposed opening 13 which forms the` sole means ofcommunication between the chambers afforded by the recesses 10 and 11and which cooperates with a valve represented at 15. The valve referredto is formedwith a conical portion 16 concentrically disposed relativeto the opening 13 and carried on the lower end of a stem 17 which hasscrew-threaded connection at a threaded portion 18 with an opening 19inthe section 6, the upper end of the stem 17 cooperating with astufiing-box 2O and carrying a pointer 21 which turns with the valve andwhich may, in practice cooperate with indications (not shown) on -a dialmember 22 carried by the upper end of the casing section 6. Ashereinafter described, the adjustment of the stem 17 length'- wise, byturning it in the section 6, controls the rate of flow through theoutlet of the casing, and the vdial 22 may present such matter thereon,for cooperation with the pointer, as to indicate the position to whichthe stem 17 is turned foreifectingthe desired rate of flow through4 theoutlet.

The inlet of the valve device is represented at 23 and opens into thespace provided by therecess 11, the outlet of the device beingrepresented at 24, this outlet communicating with a relatively smallpassage 25 in a plug,

426 screwed into the outlet 24. The passage 25 opens into a socket 27 inthe plug 26 and open at its top, this socket communicating at a port 28in the wall of the plug` with .the reduced portion 29 of the recess 10.The

through the inlet 23 operates against. the

12, under the action of a coiled spring 36 surrounding the plug 26 andconfined'between an annular shoulder 37 provided by the section 5, andtlie bottom of the disk 33.

In the normal position offfthe parts of the valve device, namely, whenno fluid pressure is being supplied thereto, the valve 31 will extendout of engagement with the seat 30.

The flow of liuid pressure to the device uppervside of the diaphragm 12with the result of flexing the latter, in opposition to the spring 36,in a direction to move the diaphragm 1 2 away from the valve 15, andconsequently permit `fluid pressure to flow` .through theopening 13 andinto 'the space provided between the disk 33 and the diaphragm 12 thenceout through the holes 35 into the recess 10 from which it passes throughthe port 28 into the socket 27. -Thus operating the diaphragm causes thevalve 31 to be forced'to closed position, andthe liuid -pressurecontinues to iiow into the recess 1 until the pressure existing in thisrecess is suiiicier t, in vcombination with thepressurc produced by thespring 36 ifn tending to expand, to equalize the pressure of theincoming fluid exerted against the upper side of the diaphragm 12. Thevalve 3L thus becomes unseatcd and permits of the tlow of fluidpressure-from the recess 10 tp and through the outlet 2 4. The drop inpressure of the fluid thereby produced in the recess 10 by the openingof the valve 31 permits the iiuid 1n entering the recess 11 to force4the diaphragm 12 downwardly and supply more fluid to the recess 10 andas the pressure increases in the recess 10 as hei-einbefore stated, thediaphragm 12 moves back toward normal position. lt will thus beunderstood from the foregoing that the differential pressure at oppositesides of the diaphragm 'being a constant and the opening therethroughalso a constant, a uniform rate of iiow of the fluid through opening 13and also the outlet 24 will be maintained regardless of variations inthe pressure of the Huid supplied to the device through the inlet 23,back-pressure at`the outlet 24. or a combination of both. The rate ofdow y through the device may be varied either by tid varying the tensionof the spring 3G, or, and as the device is shown preferably, byadjusting the valve 15 toward and away from the diaphragm 12, or by acombination of these adjustments, it being understood that the closerthe valve 15 is adjusted toward the diaphragm 12, thc less the rate ofllow through the outlet 24. By the adjustments referred to the constantof differential pressure of the fluid at opposite sides of the diaphragm12 may be varied as desired. and lby adjusting the valve 18 the constantof the opening aorded through the diaphragm -valve 32 which ispositively guided and enf gages at all times at the disk portion 33 withthe diaphragm 12, is of advantage as thereby distortion of the diaphragm12 which might otherwise occur is prevented.

Vhere the valve shown is used in a refrigerating system of theintermittent absorption type wherein the gasified refrigerant is placedin solution and from which it is boiled off in any one part of the cycleof operations, an effect which causes a reverse llow of fluid tothevalve would be produced, the valve operates automatically as a check toprevent the flow of the fluid through thel valve dei/ice.

While I haveillustrated and described a' also be varied as desired,thereby to particular construction embodying my invention, I do not wishto be understood as intending to limit it thereto as the same may bevariously modified and altered without departing from the spirit of myinvention.

'What ll claim as new and desire to secure by Letters Patent'is: y

1. A valve mechanism comprising a casing containing an inlet and anoutlet, a, chamber between said inlet and outlet, a valve controllingsaid outlet, and means for controlling said valve comprising a movablemember in said chamber against which the fluid operates at oppositefaces thereof, said member being so arranged/that the pressure of theiin-coming fluid is exerted against one face thereof and operates toproduce the floivof fluid to said valve and movement of said valvetoward closed position, the pressure of the fluid between said memberand valve being exerted against the opposite face of said. member, saidvalve in the building up of the pressure against said last-referred-toface of said member moving in a direction opposite to closing.

2. A valve mechanism comprising a casing containing an inlet and anoutlet, and :r chamber between said inlet and outlet, a member movablein said chamber and containinf,T an opening. the pressure of the fluidin said chamber operating against the opposite faces of said member, avalve co-operating with said opening, said member tending to move towarda position in which said valve closes said opening and a second valvecontrolling said outlet. said second valve being controlled by saidmember and mov- .we p

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incense ing in a direction away from closed position I secured infromclosed position of pressure between it toward closed position uponreduction 'of upon the building up of pressure between it and saidmember and toward closed position upon reduction of pressure betweensaid member and said last-named valve.

3. A valve vmechanism comprising a casing containing an inlet and anoutlet and a chamber between said inlet andoutlet, a member movable insaid chamber and containing an opening, the pressure of the iiuid insaid chamber operatingV against-the opposite faces of said member, avalve co-operating with said opening, spring means tending to move saidmember toward a position in whichsaid valve closes said opening, and asecond valve controlling saidoutlet, sa1d seconfd valve being controlleby said member and moving in a direction away upon the building up andsaid member and pressure between said named valve. a

4. A valve mechanism comprising a casing containing an inlet and anoutlet and a chamber between said inlet and outlet, a member movable insaid taining an opening, the pressure of the iiuid in said chamberoperating against the opposite .faces of said member` a valvecooperating with said opening, a second valve controlling said outlet,and a spring tending memlber and said lasttomove said last-named valveto open condition and move said member in opposition to the flow ofHuid' into the said chamber,-

said second valve being controlled by said member and moving in adirection away from closed position upon the building up of pressurebetween it and said member and toward closed position uponreduction ofpressure bet-weensaid member and said lastnamed valve.

5. A valve mechanism comprising a casing containing an inlet and anoutlet and a chamberbetween said inlet and' outlet, a diaphragm locatedWithin said chamber and place therein at its marginal edges, saiddiaphragm containing an openy ing, tmhe pressure ofdthe fluid in saidchamber operating against the opposite faces of said diaphragm, a valvecopperating with said opening, said diaphragm tending to move toward aposition in which said valve closes said opening, and a second valvecon* trolling said outlet, said second valve being controlled by saiddiaphragm and moving in a direction away from closed position upon thebuilding np of pressure between it and said diaphragm ytoward closedposition upon reduction of pressure between said diaphragm and saidlast-named valve.

A valve mechanism comprising a casing containing an Iinlet and an outletand a chamber between said inlet and outlet, a diaphragm located withinsaid chamber and chamber and consecured in' place therein at secured inplace therein at its marginal edges, saidldiaphragm containing anopening, the pressure of the Fluid in said chamber operating against theopposite faces of said diaphragm, a valve co-operating with saidopening, spring means tending to move said diaphragm toward a positionin which said valve closes said opening, and aI second valve controllingsaid outlet, said second valve being controlled by said diaphragm andmoving in a direction away from closed position upon the building up ofpressure between it and said diaphragm toward closed position uponreduction of pressure between said diaphragm and said last-named valve.

7. A valve mechanism comprising a casing containing an inlet and anoutlet and. a chamber between said inlet and outlet, a diaphragm locatedwithin said chamber and secured in place therein at its marginal edges,said diaphragm containing an opening, the pressure of the Huid in saidchamber operatingfagainst the opposite faces of said diaphragm, a valveco-operatirig with said opening, a second valve controlling said outlet,and a spring tending to move said last-namedv valve to open conditionand move said diaphragm in opposition to the fiow of fluid into valvebeing controlled by said diaphragm and moving in a direction away fromclosed position upon the building up of pressure between it and saiddiaphragm toward closed position upon reduction of pressure betlweensaid diaphragm and said'last-named va ve.

8. A valve mechanism comprising a casing containing an inlet and anoutlet and a chamber between said inlet and outlet, a

diaphragm located within said chamber and edges,'said diaphragmcontaining an opening, the pressure of the fluid in said chamberoperating against the opposite faces of said diaphragm, a valveco-operating with said opening, a second valve controlling said outletand movable in a direction at angles to the plane of said diaphragm andabutting said diaphragm, and a spring operating against said secondvalve and operating tomove the latter toward open con-f said chamber,said second its marginal' totl Illltl phragin containing`r an opening,whereby the portlons of said Chamber at opposite sides oi said diaphragmare 1n communication ywith each other. a valve of taper forni extendinginfo sziid opening. a second, receptacle valve controlling said ouiletand si spring tending to move said second valve toward open condition,said second valve abutting, under the action of said spring, against theface of said diaphragm opposite to the face thereof nearest said inlet,whereby upon the building up of pressure, between said diaphragm andsaid second `Valve, said second valve moves in a direction away fromclosed position, and upon reduction of pressure between said diaphragmand said second valve, moves toward open position.

JUHN ZANDER.

